<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>获取地区轮廓线</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.3">
</script>
<style type="text/css">
body{font-size:13px;margin:10px}
#container{width:800px;height:500px;border:1px solid gray;margin:auto auto;}
#controler {text-align:center;margin-top:30px;}
</style>
</head>
<body>
<div id="container"></div>
<div id="controler">
输入省、直辖市或县名称：<input type="text" id="districtName" style="width:80px" value="南京市">
<input type="button" onclick="getBoundary()" value="获取轮廓线"></div>

<script type="text/javascript">
var map = new BMap.Map("container");
map.centerAndZoom(new BMap.Point(116.403765, 39.914850), 5);
map.addControl(new BMap.NavigationControl({type: BMAP_NAVIGATION_CONTROL_SMALL}));
map.enableScrollWheelZoom();

function getBoundary(){
    var bdary = new BMap.Boundary();
    var name = document.getElementById("districtName").value;
    bdary.get(name, function(rs){       //获取行政区域
        map.clearOverlays();        //清除地图覆盖物
        var count = rs.boundaries.length; //行政区域的点有多少个
        for(var i = 0; i < count; i++){
            var ply = new BMap.Polygon(rs.boundaries[i], {strokeWeight: 2, strokeColor: "#ff0000"}); //建立多边形覆盖物
            map.addOverlay(ply);  //添加覆盖物
            map.setViewport(ply.getPath());    //调整视野
        }
    });
}
</script>
</body>
</html>